Subject: MathematicsTitle: Arithme-Tic-TocAdd BookmarkDescription: In this Illuminations lesson, students are introduced to modular arithmetic by first examining a five-hour analog clock and its mathematical properties. Then students investigate patterns and relationships that exist in 12-hour addition and multiplication clock tables. There are links to online activity sheets and other resources.Thinkfinity Partner: IlluminationsGrade Span: 6,7,8,9,10,11,12